Re: Problem with the serial port in Fedora Core 6

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On Friday 10 November 2006 18:35, Ashwin Ganti wrote:
>Hi,
>
>We are having trouble with detecting the serial port
>in Fedora Core 6.
>
>When I type the following command:
>setserial -g /dev/ttyS*
>
>I get the following message:
>
>Cannot get serial info: Invalid argument
>/dev/ttyS1: No such device or address
>/dev/ttyS2: No such device or address
>/dev/ttyS3: No such device or address
>
>However I tried this on two other machines running
>Fedora core 4 and Fedora core 5 and both were able to
>detect the serial port
>A typical result is
>/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
>/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
>/dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
>/dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3
>
>We are not sure if this is a problem with Fedora Core
>6.
>
>Does anyone know how to fix this issue on Fedora 6?
>Any help would be greatly appreciated.
>
>Thanks.

Aha!  So I'm not alone.  It appears there is a multilegged thing called a 
bug in the present kernel.  Let me make a couple of observations re the 
config for 2.6.18-1.2798.fc6xen.  I looked at it with a make xconfig, 
thinking I might rebuild it, and found with grep:

[root@coyote 2.6.18-1.2798.fc6-i586]# grep SER .config
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PARKBD is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_RAW=m
CONFIG_SERIAL_NONSTANDARD=y
# CONFIG_ESPSERIAL is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_CS=m
CONFIG_SERIAL_8250_NR_UARTS=32 <--------WTH?
CONFIG_SERIAL_8250_RUNTIME_UARTS=4 <----WTH?
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_DETECT_IRQ=y
CONFIG_SERIAL_8250_RSA=y
# CONFIG_SERIAL_8250_FOURPORT is not set
# CONFIG_SERIAL_8250_ACCENT is not set
# CONFIG_SERIAL_8250_BOCA is not set
# CONFIG_SERIAL_8250_HUB6 is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_SERIAL_JSM=m
# CONFIG_SND_SERIAL_U16550 is not set

Now, I snipped the USB stuff back out.  And, note that the 8250 is set for 
32 of them, with 4 being the default.  My working kernel is 2 & 2 there.  
I think I need a beer, coffee isn't working anymore :)

Can we file a bug?

-- 
Cheers, Gene


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